Isolation enhancement in a compact 2.4 GHz antenna pair for radar systems

Area of Science:

• Electromagnetics and Antennas
• Microwave Engineering
• Radar Systems

Background:

• Achieving high isolation in compact antenna pairs is crucial for efficient transceiver design.
• Existing isolation techniques often involve bulky components or complex geometries.
• Integrating transmit-receive antennas directly with radar circuitry presents a significant design challenge.

Purpose of the Study:

• To report a novel compact antenna pair with high isolation.
• To demonstrate a simple and effective isolation unit for antenna pairs.
• To facilitate the integration of radar transceiver circuits.

Main Methods:

• Utilizing two quarter-wavelength ground plane slots as a transmit-receive antenna pair.
• Implementing a compact isolation unit with shared ground and microstrip planes.
• Fabricating and measuring the antenna pair's isolation performance.

Main Results:

• Achieved a measured isolation of approximately -51 dB between the antenna pairs.
• The proposed isolation unit requires no lumped components or complex structures.
• The antenna pair exhibits broadside radiation, suitable for transceiver integration.

Conclusions:

• The developed compact antenna pair offers excellent isolation, simplifying transceiver design.
• The integrated isolation unit is effective and easy to implement.
• This antenna design is well-suited for compact, fully functional radar systems.